尿素界区有几个分程调节补充?说出其位号?
参考答案:
共有2个LIC-544、PIC-906。
— Ann is in hospital.
— Oh, really? I _____ know. I _____ go and visit her. [ ]
A. didn't; am going to
B. don't; would
C. don't; will
D. didn't; will
关于瓶装燃气充装,以下哪种说法是正确的()
A.遵守操作规程
B.严禁在储罐和槽车罐体的取样阀上充装燃气
C.可以用槽车向气瓶充装燃气或者气瓶间相互充装燃气